using Microsoft.Extensions.Logging.Abstractions;
using StellaOps.Findings.Ledger.WebService.Contracts;
using StellaOps.Findings.Ledger.WebService.Services;
using Xunit;

namespace StellaOps.Findings.Ledger.Tests.Exports;

public class AttestationQueryServiceTests
{
    [Fact]
    public void ComputeFiltersHash_IsDeterministic()
    {
        var svc = new AttestationQueryService(NullLogger<AttestationQueryService>.Instance);

        var requestA = new AttestationQueryRequest(
            TenantId: "t1",
            ArtifactId: "sha256:a",
            FindingId: null,
            AttestationId: null,
            Status: "verified",
            SinceRecordedAt: DateTimeOffset.Parse("2024-01-01T00:00:00Z"),
            UntilRecordedAt: DateTimeOffset.Parse("2024-01-02T00:00:00Z"),
            Limit: 100,
            FiltersHash: string.Empty,
            PagingKey: null);

        var requestB = requestA with { FiltersHash = "anything" };

        var hashA = svc.ComputeFiltersHash(requestA);
        var hashB = svc.ComputeFiltersHash(requestB);

        Assert.Equal(hashA, hashB);
    }

    [Fact]
    public void PageToken_RoundTrips()
    {
        var svc = new AttestationQueryService(NullLogger<AttestationQueryService>.Instance);

        var request = new AttestationQueryRequest(
            TenantId: "t1",
            ArtifactId: "sha256:a",
            FindingId: "f1",
            AttestationId: "att-1",
            Status: "verified",
            SinceRecordedAt: DateTimeOffset.Parse("2024-01-01T00:00:00Z"),
            UntilRecordedAt: DateTimeOffset.Parse("2024-01-02T00:00:00Z"),
            Limit: 50,
            FiltersHash: string.Empty,
            PagingKey: null);

        var filtersHash = svc.ComputeFiltersHash(request);
        var key = new AttestationPagingKey(DateTimeOffset.Parse("2024-01-01T12:00:00Z"), "att-9");

        var token = svc.CreatePageToken(key, filtersHash);

        var ok = svc.TryParsePageToken(token, filtersHash, out var parsed, out var error);

        Assert.True(ok);
        Assert.Null(error);
        Assert.NotNull(parsed);
        Assert.Equal(key.RecordedAt, parsed!.RecordedAt);
        Assert.Equal(key.AttestationId, parsed.AttestationId);
    }
}